Furnace valve



Marh 139 1928. H,662,24

R. D. NYE

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FURNACE VALVE Filed Dec. 2. 1926 4 sheets-sheet 4 .,..I HwwwwHw@H H@ Patented Mar. 13, 1928.

.UNITED STATES RALPH D. NYE, OF COLUMBUS, 01H0.

FUBNACE VALVE.

Application filed December 2, 1926.

The invention 'relates to an air reversing valve for open hearth and other furnaces ot' the regenerative type; and the object of the improvement is to provide an improved air 5 reversing valve for controlling and reversingI the ilowof air through the furnace and regenerators; to provide a water-cooled valve seat for each ot the air valves; to provide means for causing each valve to seat tightly l when in the lowered position, wedging the lower edge of the valve tightly against the seat and tilting the upper portion ot the valve into close relation with theseat; to

provide, integral ribs or projections upon l the valve seats, forming supports `lor the s pringers or haunches of the masonry arch of the chimney flue; and to generally iinprove and simplify the construction and operation ot reversing valves.

.An embodiment of the invention is illustrated in the accompanying drawings, forming part hereof, in which Figure l is a vertical sectional View through the improved air valve mechanism;

Fig. 2, a sectional elevation taken substantially on the line 2*:2, Fig. 1;

lig. 3', a plan elevation taken substantially on the line 3 3, Fig. l;

Fig. 1, a side elevation of the improved 30 valve seat, and p Fig. 5, a vertical section through the same taken substantially on the line 5 5, Fig. 4.

Similar numerals refer to similar parts throughout the drawings.

The improved valve 'mechanism may be used in connection'with any ordinary open hearth or other` furnace built with the usual air tunnels 1 at each end,extending through regenerators in the usual manner and lead- 40 ing to the common chimney flue 2, opening into the bottom of the chimney stack, by means ot which an induced draft is created for moving air one way or another through the furnace.

These air tunnels open straightaway into the sides of the common chimney iiue, and are also provided with the upwardly disposed ports 3 opening into the sides of the air box 4.

The gate valve 5, carried by the cables 6. which may be operated in any usual and well known manner, ma be rovided for closing the open, top si e of t e air box and for regulating the amount of air admitted 55 thereto.

The improved valve seats 'l' are pre fer- Serial No. 152,185.

ably in the form ot rectangular castings, mounted one upon each side of the chimney iiue and air box. These valve seats are preterably inclined toward each other, at their upper ends, as clearly illustrated in Fig. 1 and spaced ribs or projections 8 and 9 may be formed upon 'the inner face of each valve seat to support the springers or haunches 10 of the several courses or tiers of the arch 11 of the common chimney flue.

An air port 12 is provided in `the upper portion of each valve seat forming acommunication between the passages 3 and the air box 4and a flue opening 18 is provided in the lower portion ot each valve seat providing a communication between the air tunnels l andthe chimney lue 2.

The casting forming each va-lveseat is enlarged or thickened around theiue opening, as indicated at 14, and a continuous, unjointed pipe is imbedded therein and extends entirely around the ue opening 'as shown at 15, the ends thereof then extend;

ing' upward, upon the inner sideoiE the valve seat, and across the air port as indicated at 16, receiving the cooling intiuence from the air box, and terminating in the angular outturned ends 17.

4@ne end 17 is connected to the corresponding end of the .pipe in the other valve seat. as by the coupling 18, the vother outturned end of each pipe commu nieating with a pipe 19. One ot the pipes 19 may be connected to a suitable source of supply of water ork other cooling agent and the other pipe 19 leads to a suitable drain, -whereby cooling water may be continuously circulated 4through both valve seats and around the flue openings therein.

The gate valves 20 maybe in the form ot rectangular castings, slidably mounted againstthe outer faces of the valve seats` and preferably supported andoperated by cables 21 secured to the' ends of a rocking beam Q9., mounted upon the roclc shaft 23,

which is journaled in bearings 24 upon the brackets 25, supported upon the lupper ends ot the valve seats. These gate valves have recesses cast therein to contain refractory lining or the like.

Pulleys 26 may be provided for guiding the cables 21, and to press the gate valves` against the valve seats in the raised position. The shaft 23 `may be rocked, as by the link 27 connecting the rocker arm 29 upon the shaft 23, with a crank arm 29, operated from any suitable source of power, as'through the reduction gearing 30, or may be operated by an air cylinder.

The lower edge of each gate valve is preferably beveled substantially upon an angle of forty-tive de ees, as shown at 31, and spaced from theldwer end of each valve seat is located a bar 32 having its inner face beveled substantially at an angle of sixty degrees as shown at 33. These bars may be rigidly connected together in spaced position as by the tie bar 34.

When each gate valve 20 is moved to its lowered position, as shown at A in Fig. 1 the beveled edge 3l of the gate valve will be wedged against the beveled edge 33 of the bar 32, tightly wedging the lower end portion of the gate valve againstthe valve seat and tending to tilt the upper portion of the gate valve tightly against the valve seat, thus ell'ectually closing the flue opening 13.

The mechanism is so arranged and adjusted that when one gate valve 2O is dropped downward, to close the corresponding tlue opening 13, as indicated at A in Fig. l, the other gate valve will be raised to close the corresponding air port 12, as indicated at B in the same ligure.

This position of the valves gives a wide open conununication from the air box 4, through the left hand port l2 and corresponding air passage 3 and into the left hand air tunnel 1, as indicated by arrows on the left side of Fig. 1; while a wide open direct communication from the other air tunnel l through-the corresponding flue opening 13 and into the chimney flue 2 is rovided, as indicated by the arrows on the rig it hand side of Fig. 1.

Thus the induced draft of the stack will circulate the air into the furnace through one of the tunnels l, and from the furnace through the other tunnel l, and it will be obvious that this circulation will be reversed by reversing the positions of the valves 20.

I claim:

1. A valve mechanism `for furnaces including an upri ht water-cooled valvelseat, a gate valve sli ably mounted against said seat, a bar spaced from the lower end of the seat and having a beveled inner face, and the lower end of the gate valve being beveled at a less angle than the har, whereby the upper portion of the valve is tilted against the seat when in lowered position.

2. In a reversing valve mechanism for regenerative furnaces and the like, two watercooled valve seats, a common chimney flue having a masonry arch, the two valve seats located in the'sides of said flue and comprising castings provided with integral projections forming supports for the springers of said arch.

3. A valve mechanism for furnaces including two inclined valve seats located in the sides of a common chimney flue, gate valves slidably mounted against said seats, a bar spaced from the lower end of each seat and having a. beveled inner face, and the lower end of the gate valves being beveled at a less angle than the bars, whereby when the valves are in lowered position the lower ends of the gate valves are wedged against the seats'and the upper ends thereof are tilted against the seats.

4. In a. reversing valve mechanism for regenerative furnaces and the like, a, common chimney flue', two valve seats located in the sides of said flue and having iue openings therein, the flue having a masonry arch having its springers supported upon said valve seats and an air box above said flue, the valve seats extending above the flue and forming two of the sides of said'air box, and having ports communicating with said air box.

In a reversing valve mechanism for rcgenerative furnaces and the like, a common chimney Hue, two water-cooled valve seats vlocated in the sides of the flue, an air box above said flue, air tunnels at each side. of the flue, said valve seats having flue openings forming communication between said air tunnels and the flue, a gate valve sIidably mounted upon each seat and having a refractory lined inner face, and adapted to form a wall of the flue when in lowered position, and a passage between the 'air box and each tunnel whereby each valve when in lowered position is cooled upon its outer face v by air passing from the air box to the adjacent tunnel while the inner face of the valve is subjected to the cooling influence of the water-cooled valve seat.

G. In a reversing valve mechanism for regenerative furnaces and the. like, a. valve seat, a chimney flue having a masonry arch, the valve seat located in the side of said flue and comprising a casting provided with an integral projection forrning a support for the adjacent springer of the arch.

In testimony that I claim the above. I have hereunto subscribed my name.

s RALPH D. NYE. 

